کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4479547 1316448 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanism of improved phosphate uptake efficiency in banana seedlings on acidic soils using fertigation
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Mechanism of improved phosphate uptake efficiency in banana seedlings on acidic soils using fertigation
چکیده انگلیسی

Fertigation improves nutrient uptake efficiency greatly, while the mechanism of increased nutrient uptake efficiency remains unclear. In this study, the effects of conventional phosphate (P) fertilization (by mixing fertilizer with soils) and fertigation (by dissolving fertilizer in water) on P uptake were compared in banana (Musa sapientum) seedlings. Results indicated that, compared with conventional fertilization, fertigation increased the concentration of available P by 108% and decreased the P sorption index by 31% in the 0–8 cm surface soil of banana roots. Fertigation enhanced the transformation of different P fractions, increased the concentrations of aluminum-bound P (Al–P), iron-bound P (Fe–P) and occluded-P (O-P), and decreased the pH value by 0.3 units. However fertigation did not influence the activity of acid phosphatase, but increased microbial biomass and root activity by 25.5–67.8%. Furthermore, fertigation increased the root distribution in the 0–8 cm soil layer by 7.8–9.4% compared with conventional fertilization. These results suggest that fertigation increases P uptake efficiency as the result of increased root activity, root distribution, microbial biomass and reduced P sorption index in the surface soil of banana seedlings.

Research highlights▶ Fertigation increased soil available P and decreased the P sorption index. ▶ Fertigation increased the concentrations of soil Al-P, Fe-P and occluded-P. ▶ Fertigation decreased soil pH value. ▶ Fertigation increased root activity and root distribution in surface soil. ▶ Improved P uptake efficiency was due to increased root activity and P availability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 98, Issue 4, February 2011, Pages 632–638
نویسندگان
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